氧化镓的同步辐射研究

崔启良; 涂宝招; 潘跃武; 王成新; 高春晓; 张剑; 刘景; 邹广田

doi:10.11858/gywlxb.2002.02.001

氧化镓的同步辐射研究

doi: 10.11858/gywlxb.2002.02.001

1.
吉林大学超硬材料国家重点实验室，吉林长春 130023；
2.
中国科学院高能物理研究所，北京 100039

详细信息

通讯作者:
崔启良

计量
- 文章访问数: 14160
- HTML全文浏览量: 1060
- PDF下载量: 1044
出版历程
- 收稿日期: 2002-01-28
- 修回日期: 2002-03-30
- 发布日期: 2002-06-05

Synchrotron Radiation Diffraction of Gallium Oxide under High Pressure

1.
National Laboratory of Superhard Materials, Jilin University, Changchun 130023, China;
2.
Institute of High Energy, Chinese Academy of Sciences, Beijing 100039, China

More Information

Corresponding author: CUI Qi-Liang

摘要

摘要: 利用金刚石对顶砧（DAC）高压装置产生高压，使用体积比为16∶3∶1的甲醇、乙醇和水混合液作为传压介质，通过原位高压同步辐射技术对氧化镓的高压行为进行了研究（0～42.5 GPa）。实验发现在室温下13.3 GPa压力附近，单斜结构的氧化镓发生了结构相变，变成三角结构。相变后镓离子由原来同时位于由氧离子围成的四面体和八面体的中心位置变成只位于八面体的中心位置。卸压后的X射线衍射谱表明，氧化镓又恢复为单斜结构，该相变为可逆相变。
- 氧化镓 /
- 同步辐射 /
- 高压相变 /
- DAC
Abstract: The in-situ synchrotron radiation diffraction of gallium oxide under high pressure has been studied in the range of 0～42.5 GPa with diamond anvil cell (DAC), using methanol-ethanol-water (16∶3∶1) mixture as transmission medium. We have found that under room temperature, the monoclinic gallium oxide turns into a rhombohedral one under 13.3 GPa. After the phase changs, the Ga ions are only at the centers of the octahedrons instead of their original locations which are at both the centers of the octahedrons and the tetrahedrons. When the pressure goes back to ambient pressure, the sample turns back to monoclinic structure.
- gallium oxide /
- synchrotron radiation /
- high pressure /
- phase transition

HTML全文

参考文献(7)

Zoltan Hajnal,Jozsef Miro,Gabor Kiss,et al.Role of Oxygen Vacancy Defect States in the n-Type Conduction of -Ga2O3 [J]. J Appl Phys, 1999, 86(7): 3792-3796.

Wu X C, Song W H, Huang W D,et al.Crystalline Gallium Oxide Nanowires:Intensive Blue Light Emitters [J]. Chemical Physics Letters, 2000, 328: 5-9.

Rustum Roy, Hill V G, Osborn E F.Polymorphism of Ga2O3 and the System Ga2O3-H2O [J]. Journal of American Chemistry, 1952, 74: 719-722.

Geller S.Crystal Structure of -Ga2O3 [J]. Journal of Chemical Physics, 1960, 33(3): 676-684.

Marezio M, Remeika J P. Bond Lengths in the -Ga2O3 Structure and the High-Pressure Phase of Ga2-xFexO3 [J]. Journal of Chemical Physics, 1967, 46(5): 1862-1865.

LIU Jing, ZHAO Jing, CHE Rong-zheng, et al. In Situ Energy Dispersive Diffraction under High Pressure Using Synchrotron Radiation [J]. Chinese Journal of High Pressure Physics, 2000, 14(4): 247-252. (in Chinese)

刘景, 赵菁, 车荣钲, 等.高压下的同步辐射能量色散粉末衍射 [J]. 高压物理学报, 2000, 14(4): 247-252.

施引文献

资源附件(0)

访问统计